Hot-blast stove.



J. I. LARIMER.

HOT BLAST STOVE.

A APPLIOTION FILED HAY 22, 190e.

Patented Feb. 16, 1909.

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4 SHEETS-SHEET 1.

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J. I. LARIMER.

HOT BLAST STOVE.

APPLIonIoN FILED Mn 22. 1906.

Patented Feb. 16, 1909.

4 sums-snm n. .2.

WITNESSES INVENTOR J`. 1'. LARIMER.

HOT'BLAST STOVE.

.XPPLIOATION FILED MAY 22, 1906.

Patented Feb. 16, 1909.

4 SHEETS-SHEET 3.

i @WL-f@ WITNESSES J. I. LARIMBR.

HOT BLAST sTovE.

APPLTOLTION FILED IAY 22, 1906.

v $91 Patented Feb. I6, 1909.

4 SHEETS-SHEET 4.

"wanton WITNESSES JAMES I. LARIMER, OF JOLIET, ILLINOIS.

HOT-BLAST STOVE Specification of Letters Patent.

Patented Feb. 16, 1909.

Application led May 22, 1906. Serial No. 318,122.

' tion of the top portion taken through one of the side ports; Fig. 3 is a vertical section of the lower portion of the stove on the line III-III of Fig. 1; Fig. 4 is a-crosssection on the 'irregular line IV-IV of Fig. 1 and F 1g. 5 is .a cross-section on the irregular line Vf-V of Fig. 3.

My invention relates to the class of hot blast stoves, and is designed to increase the eiliciency of the stove and give economy of operation.

`To this `end the invention consists in ini clining or shaping the bottom of the stove lthrough suitable ports or openings.

in such a manner that the flue dust, etc. will he. collected and may be easily taken out This arrangement of the b'ottom may be carried out either for the entire bottom of the stove',

or,for the part or parts thereof in which the main Vcollection of dust occurs.

The invention further consists inthe construction and arran ement of parts as hereinafter more vfully escribed and claimed.

' In the drawings in which I have shown my invention as applied toa four-pass stove, 2 represents the :[irst vpass or.. combustion chamber, 3 the checker-work in the second pass, 4 the checker-work in the third pass, andf5 the checker-work in the fourth pass.

These passes are separated from each otherby the usual partitions 67 and 8.

9 re resents the inlet for the waste gases from the blast furnace near the bottom of the combustion chamber, and 10 represents air inlets at the sides thereof. These ports Vmay be lcontrolled in any-desirable manner. At the bottom of the fourth pass is the cold blast inlet 11 and the chimney ports 12, 12 which" are controlled` in any desirable manner.

The main collection of dust occurs in the rst,' second and third .passes. In these passes, therefore, I provide my improved bottonrarrangement for collecting and taking out the dust accumulation. In the combustion chamber the bottom 13 is inclined downwardly and outwardly, vand the lsides are also inclined inwardly, so` that the dust will settle down by gravity on the .inclined bottom, and may be taken out through the outlet port Il which may be controlled by any suitable door or closure. This outlet as shown is directly below the gas inlet, though it may be arranged at one or both sides.`

The bottom of the stove below the second and third passes is inclined downwardly and inwardly in opposite directions as shown .by the dotted lines at 15 and 1G, Fig.n l. These inclined bottom faces extend below the arches 17 supporting the checker-work, and feed the dust down into the space '18. The bottom of this space is of ridge form with oppositely inclined faces 19 which lead to outlet ports 20 at the sides of the stove. These'outlet 4ports may be controlled by any suitable doors or closures, andthrough them the dust which settles down in the second and third passes may be taken out from time.

In order to operate the stove with a proper regulation of temperature so that during the first stage of heating up the checker-work,.

it may be operated at the highest temperature consistent wlth minimum slaggmg down, or melting of the walls of the combastion chamber and checker-work of the first i or rst and second passes, I provide one or more pyrometers or temperature measurements 21a.

-gases contacting with the pyrometer may be obtained.' The 'operator can thusascertain the temperatures of the gases at the desired` points, andV will thus be able to properly These instruments may be insert'- l ed through the side walls of the stove in any' .desirable location or regulate the air and gas, and heat the stove to the temperatures for giving the highest efficiency Without melting down,

.The advantages of my invention Will be` apparent to those skilled in the art. ABy

the dust and consequently requiring less fre,

quent periods for cleaning out and repairs, in addition to the time and labor saved in Cleaning. By removing the dust at suitable intervals, the stove will retain its maximum eficiency much longer than with prior con-` structions. Then i-t becomes necessary to shut down the stove for cleaning and repairs it must be cooled down to a temperature which will enable men to enter and work inside of it. This cooling and contraction of the brick-work decreases the life of the stove, and consequently my invention lengthens the life of the stove, as well as decreasing the cost of cleaning and repairs.

The invention may be applied to stoves having two, three or more passes, and ot' any desirable type; the .inclined bottom arrangement may be applied to one'ormore of the passes; one on more of the pyrometers or temperature-measuring instruments may' applied at any deslrable place or places inf' 'the stove, and other changes may' be made Without departing from my invention.

1. A hot blast'stove having an outlet opeliing in the lower portion of its side vWall and provided With anV inclined bottom which slopes downwardly and outwardly toward said opening to direct the dust thereto; substantially as described. Y

A hot blast stove having an oppositely inclined ridge beneath the checker work and leading to outlet ports. in the side .walls otthe stove and arranged to discharge the dust outwardly beyond the sides; substantially as described.

A hot blast stovehaving a downwardly and` outwardly inclined bottom portion beneath at least' one pass, the side wall of vthe Y 

